It only gives the measurements from the centre of the stand.
Looking at this image we can estimate that each glass rectangle is roughly 4m give or take. Seeing there is two whole, two partial and about one more would take it up to the height of the top edge and the full 47m. So towards the very corners it might be closer to 37m. We have to remember though as the corners of the bowl have already cut across before that point, it would probably be better to take the measurement from the first steel column. That would put it at around 40ish (without printing it out and getting a ruler involved).
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